Arthrology (ARTHROLOGIA) - the science of bones connection

Development of the bones connections.On 6-7 th week between the cartilage bones models occurs the concentration of mesenchyme. Then development of the bones connections goes by two ways:1) from the mesenchyme forms fibrous or cartilaginous tissue (development of the uninterrupted bones connection);2) liquefaction of the mesenchyme (development of the interruptions bones connection).

The joint is the body which has main and auxiliary elements.Main elements (always present in every joint) of the joint:- Joint surfaces- Articular cartilage- Joint capsule. The capsule has two layers: the outer - fibrous membrane, and inner - synovial membrane. Synovial membrane can form the folds and the bags.- Articular cavity- Synovial fluid.

Auxiliary elements (can not be part of the joint) of the joint:- Articular disc- Articular meniscus- Articular lip- Ligament.